Decorative shell of a bulb assembly



FIG. 1 is a perspective view of a decorative shell of a bulb assembly showing my new design.

FIG. 2 is a front plan view thereof.

FIG. 3 is a rear plan view thereof.

FIG. 4 is a top plan view thereof.

FIG. 5 is a bottom plan view thereof.

FIG. 6 is a left side plan view thereof; and,

FIG. 7 is a right side plan view thereof. 

The ornamental design for a decorative shell of a bulb assembly, as shown and described. 